Intel D850EMD2 Specification Update - Page 15

Intel Desktop Board D850EMD2 Specification Update SPECIFICATION CLARIFICATIONS The Specification Clarifications listed in this section apply to the Desktop Board D850MD2 Technical Product Specification (Order Number A94395). All Specification Clarifications will be incorporated into a future version of that specification. 1. Clarification of SMBus Routing Section 2.8.2.1 will change in its entirety as follows: 2.8.2.1 Expansion Slots The board has the following expansion slots: • One AGP connector. The AGP connector is keyed for 1.5 V AGP cards only. Do not install a legacy 3.3 V AGP card. The AGP connector is not mechanically compatible with legacy 3.3 V AGP cards. • PCI 2.2-compliant local bus slots (three on the desktop board D850EMD2; five on the desktop board D850EMV2). The SMBus is routed to PCI bus connector 2 only (ATX expansion slot 4). PCI add-in cards with SMBus support can access sensor data and other information residing on the board. • One CNR connector (optional), shared with PCI bus connector 3 (ATX expansion slot 1) on the desktop board D850EMD2 or with PCI bus connector 6 (ATX expansion slot 1) on the desktop board D850EMV2. ✏ NOTE The SMBus routing to the PCI bus connectors does not conform to the PCI Engineering Change Notice (ECN) "Addition of the SMBus to the PCI Connector ECN", dated October 5th, 2000. The ECN specifies that SMBus signals must be routed to all PCI bus connectors. On this board, SMBus signals are routed to PCI bus connector 2 only. Add-in cards that implement PCI bus connector pins A40 and A41 for any purpose other than SMBCLK (SMBus clock) and SMBDAT (SMBus data) should not be installed in PCI bus connector 2. For information about Addition of the SMBus to the PCI Connector ECN Refer to http://www.pcisig.com/data/s pecifications/smb_ecn_0405 01.pdf 9